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E <br /> ENVIRON . , <br /> Analytical Chemists <br /> February 26, 2021 Lab ID : STK2131819 <br /> Eclipse Metal Fab Customer : 3-18587 <br /> Quality Control-Inorganic <br /> Constituent Method Date/ID Type Units Cone. QC Data DQO Note <br /> Metals <br /> Chromium 6010B 02/19/21:202511AC CCV ppm 1.000 101% 90-110 <br /> CCB ppm -0.0004 0.01 <br /> CCV ppm 1.000 103% 90-110 <br /> CCB ppm 0.00003 0.01 <br /> Copper 6010B 02/19/21:202511 AC CCV ppm 1.000 110% 90-110 <br /> CCB ppm 0.0066 0.01 <br /> CCV ppm 1.000 115% 90-110 <br /> CCB I ppm 0.0091 1 0.01 <br /> Nickel 6010B 02/19/21:202511AC CCV ppm 1.000 99.8% 90-110 <br /> CCB ppm 0.0007 0.01 <br /> CCV ppm 1.000 103% 90-110 <br /> CCB ppm 0.0008 0.01 <br /> Chromium CA STLC 02/19/21:201853AC ExBlk mg/L -0.0006 0.01 <br /> PDS m /L 4.000 190% N/A <br /> Copper CA STLC 02/19/21:201853AC ExBlk mg/L -0.0008 0.01 <br /> PDS I m /L 4.000 1 194% 1 N/A <br /> Nickel CA STLC 02/19/21:201853AC ExBlk I mg/L0.0001 0.01 <br /> PDS m /L 4.000 -180% N/A <br /> Definition <br /> PDS PDS failed,matrix-Post Digestion Spike(PDS)not within Acceptance Range(AR)because of matrix interferences affecting this <br /> analyte.Data was accepted based on the LCS recovery. <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> CCB :Continuing Calibration Blank-Analyzed to verify the instrument baseline is within criteria. <br /> ExBlk :TCLP/STLC Extraction Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 3 of 3 <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 <br /> TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 <br /> Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 <br /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />